MDVL132046 Repair Fire Station Roof Bldg 155 SOW rev 8 July 2022.pdf

STATEMENT OF WORK

Project No. MDVL132046

Key Field Air National Guard Base, Meridian, Mississippi

REPAIR FIRE STATION ROOF BLDG 155

15 March 2022

I. PURPOSE: The scope of this Statement of Work provides the requirements necessary to repair a roof at Bldg 155 at Key Field Air National Guard Base in Meridian, Mississippi.

A. APPLICABLE REFERENCE DOCUMENTS:

1. Site Photographs

2. Original Construction As-Built Drawings

3. Spec Section 024100 – Demolition

4. Spec Section 055013 – Miscellaneous Metal Fabrications

5. Spec Section 075450 – Thermoplastic Polyolefin (TPO) Membrane Roofing

6. Spec Section 079200 – Joint Sealants

II. REQUIREMENTS: The Contractor shall provide all, labor, supervision, parts, materials, equipment, tools, freight, rigging, temporary toilet facilities (if required) and transportation required at Key Field Air National Guard Base, as requested and described below.

1. Remove existing EPDM roof membrane, approximately 10,400 square feet (not including membrane turned up at parapets).

2. Remove and re-install or temporarily relocate existing lightning protection and communications cabling, connectors, and fasteners.

3. Replace all parapet cap flash and coping with new mastic and neoprene-washered mechanical attachments as necessary to wrap new TPO membrane over parapet wall.

New cap or coping shall be minimum 20-gauge thickness with Kynar 500 (or approved equal) 20 year finish warranty. Government shall have manufacturer’s full color selection, including premium options.

4. Remove any damaged insulation or flashing and replace with same or equal materials.

Insulation shall be R19 minimum (consider 2,500 square feet replacement as an ALLOWANCE to the bid).

5. Install mechanically fastened ½” DensGlass (or approved equal) recovery board.

6. Install new fully-adhered fleeceback TPO membrane as specified and according to manufacturer’s recommendations, minimum 20 year NDL warranty.

7. Install continuous termination bar along parapet walls and clerestory.

8. Replace all vent pipe boots and flashing with compatible materials for vent purpose and new roof system as applicable. Coat vent pipes with manufacturer’s recommended coating material.

9. Replace all roof drain flashings, grates, and grate covers (18 each).

10. Replace deck insulation, recovery board and roofing membrane at all curbed areas as required.

11. Repair, reinforce, and/or add flashings or crickets as necessary to ensure positive drainage. Installer shall make every effort to mechanically eliminate all ponding water areas prior to any application of coatings.

12. Remove existing tiling and tar underlayment on Plaza Deck, Room 201 (refer to Second Floor Plan, Sheet A1, and Detail 3, Sheet A13), approximately 720 square feet.

13. Install sheet membrane for thin-bed waterproofing and crack isolation for exterior applications with tile (Noble Deck, or approved equal) in accordance with manufacturer’s requirements. Membrane system must provide 10-year minimum warranty, be appropriate for this application, and total system must be compatible with all existing conditions. Modify, as necessary, existing parapet cap and wall flashings at the perimeter to properly terminate and flash the membrane. Prepare surface in accordance with manufacturer’s recommendations with special care to removal of prior materials, surface uniformity, existing drains, expansion joints, and existing parapet.

14. Install compatible thin-set and heavy-duty, slip-resistant porcelain tile with a PEI rating of 4 or higher for durability (Happy Floors - Eternity Forest, or approved equal).

Contractor shall allow for 12”x12” or 12”x24” tiles and a standard or brick laying pattern, to be determined by Government during submittals. Additionally, mosaic tile shall be installed around existing drains. Unless the membrane or tile manufacturer explicitly recommends otherwise, the existing full-depth expansion joints shall be cleaned, and re-constructed as full depth expansion joints as a part of this work. Joint sealant shall be colored similar to selected tile grout color.

15. Tile shall be grouted with a heavy-duty, chemically resistant grout appropriate for outdoor heavy-traffic areas with multiple color alternatives (Laticrete Spectralock 2000 IG, or approved equal). Color to be determined by Government during submittal process.

16. Contractor shall take care not to damage the facilities and grounds any more than necessary to perform the work, and shall protect and restore the site throughout construction. The Contractor is responsible to repair any damage to bring the facility and grounds back to pre-construction conditions.

17. JOB SITE INSPECTION. The Contractor shall keep all work sites of trash and debris. The Government will inspect the work area around the work site at its discretion. Any cleaning or trash problems not corrected by the Contractor in a timely manner will result in payment being withheld until the problem is corrected.

18. TOOLS. The Contractor shall supply all tools and equipment to provide services required in this SOW. The Contractor SHALL NOT, at any time, borrow or use any tools or equipment from Key Field shops or its employees (state, contract, or federal).

This includes forklifts, motorized lifts, electric carts, hand tools, power tools, etc.

III. PERIOD OF PERFORMANCE: The project shall be accepted as substantially complete within 90 calendar days after issuance of the Notice to Proceed.

IV. ENVIRONMENTAL MANAGEMENT: Key Field ANGB is committed to AFPD 90-8 for all base personnel and operations to include construction and all contractors working on behalf of the Government. The primary tenets of AFPD 90-8 are: Environmental Compliance, Risk Management, and Continuous Improvement. As applicable, the Contractor is responsible for the following:

1. Provide copies of all Hazardous Material SDS’s (oil, paints, adhesives, refrigerant, etc) to the Contracting Officer for approval prior to use, and provide total usage of each item upon completion and prior to project closeout for required EPCRA 313 tracking. Additionally, any reclaimed or re-used refrigerant must be documented at project closeout by weight, type, and management method.

2. Provide secondary containment for all liquid Hazardous Materials in containers 55 gallons or larger.

3. Track and report amount of waste generated and method of disposal (recycled, reused, or landfilled). All waste must be managed or disposed in a legal manner.

Unless specifically noted, all waste belongs to the Contractor. Key Field ANGB’s existing solid waste program, to include green boxes and construction debris containers, SHALL NOT be used for Contractor’s waste unless explicitly authorized in writing.

4. Coordinate and secure MDEQ permits, as applicable, for emissions equipment and Storm Water Construction.

The afore-mentioned items highlight requirements for service and construction contracts but are not all inclusive. A more in-depth Environmental Contractor Packet is available upon request.

V. QUALITY ASSURANCE: The Government will provide visual inspections as needed to ensure that all work described in this SOW are complete.

VI. WORK SCHEDULE: All installation work associated with this contract shall be accomplished during daily work hours between 07:00 a.m. to 04:30 p.m. Monday through Friday except for Federal Holidays and compressed work days. The Government must approve any deviation from these hours.

VII. WARRANTY: The Contractor to finish all work in a professional manner, employing best construction practices, using all new materials as approved by the owner (unless otherwise noted). Labor, equipment and materials installed by the Contractor shall be guaranteed by the Contractor to be free from defect for a period of one year (unless noted otherwise by specification) from the date of final acceptance.

VIII. SAFETY AND FIRE PREVENTION: Contractor must comply with all appropriate Occupational Safety and Health Administration (OSHA) and National Fire Prevention Association (NFPA) regulations during construction. Contractor shall receive a burn permit from the Fire Department at Key Field ANG Base prior to any hot work, welding, or potential fire hazard operations. All personnel working in or around the facility shall be thoroughly briefed on any dangers in the area.

IX. BASE & FACILITY ACCESS: The Contractor shall coordinate with the 186th Security Forces Squadron and Contracting Officer to gain access to Key Field ANG Base and the operating area where work is to be performed. Contractor shall also coordinate with the BCE to avoid adverse impacts to Key Field flying mission or mission support functions.

END OF STATEMENT OF WORK

SITE PHOTOGRAPHS

ORIGINAL CONSTRUCTION AS-BUILT DRAWINGS

TECHNICAL SPECIFICATIONS

SECTION 02 41 00 Page 1

SECTION 02 41 00

DEMOLITION

PART 1 GENERAL

1.1 General Requirements

Do not begin demolition or deconstruction until authorization is received from the Contracting Officer. The work of this section is to be performed in a manner that maximizes the value derived from the salvage and recycling of materials. Remove rubbish and debris from Government property daily, unless otherwise directed. Store materials that cannot be removed daily in areas specified by the Contracting Officer. In the interest of occupational safety and health, perform the work in accordance with EM 385-1-1, Section 23, Demolition, and other applicable Sections.

1.2 ITEMS TO REMAIN IN PLACE

Take necessary precautions to avoid damage to existing items to remain in place, to be reused, or to remain the property of the Government. Repair or replace damaged items as approved by the Contracting Officer.

Coordinate the work of this section with all other work indicated.

Construct and maintain shoring, bracing, and supports as required. Ensure that structural elements are not overloaded. Increase structural supports or add new supports as may be required as a result of any cutting, removal, deconstruction, or demolition work performed under this contract. Do not overload structural elements. Provide new supports and reinforcement for existing construction weakened by demolition, deconstruction, or removal work. Repairs, reinforcement, or structural replacement require approval by the Contracting Officer prior to performing such work.

1.2.1 Existing Construction Limits and Protection

Do not disturb existing construction beyond the extent indicated or necessary for installation of new construction. Provide temporary shoring and bracing for support of building components to prevent settlement or other movement. Provide protective measures to control accumulation and migration of dust and dirt in all work areas. Remove dust, dirt, and debris from work areas daily.

1.2.2 Weather Protection

For portions of the building to remain, protect building interior and materials and equipment from the weather at all times. Where removal of existing roofing is necessary to accomplish work, have materials and workmen ready to provide adequate and temporary covering of exposed areas.

1.2.3 Utility Service

Maintain existing utilities indicated to stay in service and protect against damage during demolition and deconstruction operations.

1.2.4 Facilities

Protect electrical and mechanical services and utilities. Where removal of existing utilities and pavement is specified or indicated, provide

SECTION 02 41 00 Page 2 approved barricades, temporary covering of exposed areas, and temporary services or connections for electrical and mechanical utilities. Floors, roofs, walls, columns, pilasters, and other structural components that are designed and constructed to stand without lateral support or shoring, and are determined to be in stable condition, must remain standing without additional bracing, shoring, or lateral support until demolished or deconstructed, unless directed otherwise by the Contracting Officer.

Ensure that no elements determined to be unstable are left unsupported and place and secure bracing, shoring, or lateral supports as may be required as a result of any cutting, removal, deconstruction, or demolition work performed under this contract.

1.2.5 Traffic Control Signs

1.2.5.1 Where pedestrian and driver safety is endangered in

the area of removal work, use traffic barricades with flashing lights. Anchor barricades in a manner to prevent displacement by wind, jet or prop blast. Notify the Contracting Officer prior to beginning such work.

1.2.6 Protection of Personnel

Before, during and after the continuously evaluate the condition of the structure and take immediate action to protect all personnel working in and around the project site. No area, section, or component of floors, roofs, walls, columns, pilasters, or other structural element will be allowed to be left standing without sufficient bracing, shoring, or lateral support to prevent collapse or failure while workmen remove debris or perform other work in the immediate area.

1.3 FOREIGN OBJECT DAMAGE (FOD)

Aircraft and aircraft engines are subject to FOD from debris and waste material lying on airfield pavements. Remove all such materials that may appear on operational aircraft pavements due to the Contractor's operations. If necessary, the Contracting Officer may require the Contractor to install a temporary barricade at the Contractor's expense to control the spread of FOD potential debris. The barricade shall include a fence covered with a fabric designed to stop the spread of debris. Anchor the fence and fabric to prevent displacement by winds or jet/prop blasts.

Remove barricade when no longer required.

1.4 RELOCATIONS

Perform the removal and reinstallation of relocated items as indicated with workmen skilled in the trades involved. Repair or replace items to be relocated which are damaged by the Contractor with new undamaged items as approved by the Contracting Officer.

1.5 EXISTING CONDITIONS

Before beginning any demolition or deconstruction work, survey the site and examine the available drawings and specifications to determine the extent of the work.

PART 2 EXECUTION

2.1 EXISTING FACILITIES TO BE REMOVED

Inspect and evaluate existing structures onsite for reuse. Existing

SECTION 02 41 00 Page 3 construction scheduled to be removed for reuse shall be disassembled.

Dismantled and removed materials are to be separated, set aside, and prepared as specified, and stored or delivered to a collection point for reuse, remanufacture, recycling, or other disposal, as specified.

Materials shall be designated for reuse onsite as described. Utilities and Related Equipment

2.1.1 General Requirements

Do not interrupt existing utilities serving occupied or used facilities, except when authorized in writing by the Contracting Officer. Do not interrupt existing utilities serving facilities occupied and used by the Government except when approved in writing and then only after temporary utility services have been approved and provided. Do not begin demolition or deconstruction work until all utility disconnections have been made.

Shut off and cap utilities for future use, as indicated.

2.1.2 Roofing

Remove single-ply roofing to effect the connections with new flashing and/or roofing. Sequence work to minimize building exposure between demolition or deconstruction and new roof materials installation.

2.1.2.1 Reroofing

When removing the existing roofing system from the roof deck, remove only as much roofing as can be recovered by the end of the work day, unless approved otherwise by the Contracting Officer. Do not attempt to open the roof covering system in threatening weather. Reseal all openings prior to suspension of work the same day.

2.1.3 Miscellaneous Metal

Salvage shop-fabricated items such as access doors and frames, steel gratings, metal ladders, wire mesh partitions, metal railings, metal windows and similar items as whole units. Salvage light-gage and cold-formed metal framing, such as steel studs, steel trusses, metal gutters, roofing and siding, metal toilet partitions, toilet accessories and similar items. [Scrap metal shall become the Contractor's property.] Recycle scrap metal as part of demolition and deconstruction operations.

Provide separate containers to collect scrap metal and transport to a scrap metal collection or recycling facility, in accordance with the Waste Management Plan.

2.1.4 Mechanical Equipment and Fixtures

Disconnect mechanical hardware at the nearest connection to existing services to remain, unless otherwise noted. Disconnect mechanical equipment and fixtures at fittings.

2.2 DISPOSAL OF REMOVED MATERIALS

2.2.1 Regulation of Removed Materials

Dispose of debris, rubbish, scrap, and other nonsalvageable materials resulting from removal operations with all applicable federal, state and local regulations as contractually specified.

2.3 REUSE OF SALVAGED ITEMS

SECTION 02 41 00 Page 4

Recondition salvaged materials and equipment designated for reuse before installation. Replace items damaged during removal and salvage operations or restore them as necessary to usable condition.

-- End of Section --

SECTION 05 50 13 - 1

SECTION 05 50 13

MISCELLANEOUS METAL FABRICATIONS

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ALUMINUM ASSOCIATION (AA)

AA DAF45 (2003; Reaffirmed 2009) Designation

System for Aluminum Finishes

AMERICAN INSTITUTE OF STEEL CONSTRUCTION (AISC)

AISC 303 (2016) Code of Standard Practice for Steel

Buildings and Bridges

AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE 7 (2017) Minimum Design Loads for Buildings and Other Structures

ASME INTERNATIONAL (ASME)

ASME B18.2.1 (2012; Errata 2013) Square and Hex Bolts and Screws (Inch Series)

ASME B18.2.2 (2015) Nuts for General Applications:

Machine Screw Nuts, Hex, Square, Hex Flange, and Coupling Nuts (Inch Series)

ASME B18.6.2 (1998; R 2010) Slotted Head Cap Screws, Square Head Set Screws, and Slotted Headless Set Screws: Inch Series

ASME B18.6.3 (2013; R 2017) Machine Screws, Tapping

Screws, and Machine Drive Screws (Inch Series)

ASME B18.21.1 (2009; R 2016) Washers: Helical

Spring-Lock, Tooth Lock, and Plain Washers (Inch Series)

ASME B18.21.2M (1999; R 2014) Lock Washers (Metric Series)

ASME B18.22M (1981; R 2017) Metric Plain Washers

ASTM INTERNATIONAL (ASTM)

ASTM A29/A29M (2016) Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought

ASTM A36/A36M (2014) Standard Specification for Carbon

SECTION 05 50 13 - 2

Structural Steel

ASTM A47/A47M (1999; R 2018; E 2018) Standard

Specification for Ferritic Malleable Iron

Castings

ASTM A48/A48M (2003; R 2012) Standard Specification for Gray Iron Castings

ASTM A53/A53M (2018) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A108 (2013) Standard Specification for Steel

Bar, Carbon and Alloy, Cold-Finished

ASTM A123/A123M (2017) Standard Specification for Zinc

(Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A153/A153M (2016) Standard Specification for Zinc

Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A283/A283M (2013) Standard Specification for Low and

Intermediate Tensile Strength Carbon Steel Plates

ASTM A307 (2014; E 2017) Standard Specification for

Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength

ASTM A467/A467M (2007; R 2012) Standard Specification for

Machine Coil Chain

ASTM A475 (2003; R 2014) Standard Specification for

Zinc-Coated Steel Wire Strand

ASTM A500/A500M (2018) Standard Specification for

Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes

ASTM A653/A653M (2019) Standard Specification for Steel

Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

ASTM A780/A780M (2009; R 2015) Standard Practice for

Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings

ASTM A786/A786M (2015a) Standard Specification for

Hot-Rolled Carbon, Low-Alloy, High-Strength Low-Alloy, and Alloy Steel Floor Plates

SECTION 05 50 13 - 3

ASTM A924/A924M (2018) Standard Specification for General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process

ASTM B26/B26M (2014; E 2015) Standard Specification for

Aluminum-Alloy Sand Castings

ASTM B108/B108M (2018) Standard Specification for Aluminum-Alloy Permanent Mold Castings

ASTM B209 (2014) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

ASTM B209M (2014) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric)

ASTM B221 (2014) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

ASTM B221M (2013) Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes (Metric)

ASTM C1513 (2018) Standard Specification for Steel

Tapping Screws for Cold-Formed Steel Framing Connections

ASTM D1187/D1187M (1997; E 2011; R 2011) Asphalt-Base

Emulsions for Use as Protective Coatings for Metal

ASTM E488/E488M (2015) Standard Test Methods for Strength of Anchors in Concrete and Masonry Elements

ASTM F1554 (2018) Standard Specification for Anchor

Bolts, Steel, 36, 55, and 105-ksi Yield Strength

MASTER PAINTERS INSTITUTE (MPI)

MPI 79 (2012) Primer, Alkyd, Anti-Corrosive for

Metal

NATIONAL ASSOCIATION OF ARCHITECTURAL METAL MANUFACTURERS (NAAMM)

NAAMM MBG 531 (2017) Metal Bar Grating Manual

NAAMM MBG 532 (2009) Heavy Duty Metal Bar Grating Manual

SECTION 05 50 13 Page 4

1.2 SUBMITTALS

Government may require submittals on any and all products proposed for use.

1.3 DELIVERY, STORAGE, AND PROTECTION

Protect from corrosion, deformation, and other types of damage. Store items in an enclosed area free from contact with soil and weather. Remove and replace damaged items with new items.

1.4 MISCELLANEOUS REQUIREMENTS

1.4.1 Fabrication Drawings

Submit fabrication drawings showing layout(s), connections to structural system, and anchoring details as specified in AISC 303.

1.4.2 Installation Drawings

Submit templates, erection, and installation drawings indicating thickness, type, grade, class of metal, and dimensions. Show construction details, reinforcement, anchorage, and installation in relation to the building construction.

PART 2 PRODUCTS

2.1 MATERIALS

Provide exposed fastenings of compatible materials (avoid contact of dissimilar metals). Coordinate color and finish with the material to which fastenings are applied.

2.1.1 Gratings

a. Provide gray cast iron in accordance with ASTM A48/A48M, Class 40.

2.1.2 Anchor Bolts

Provide in accordance with ASTM F1554. Where exposed, provide anchor bolts of the same material, color, and finish as the metal to which they are applied.

2.2.7.1 Lag Screws and Bolts

Provide in accordance with ASME B18.2.1, type and grade best suited for the purpose.

2.2.7.2 Bolts, Nuts, Studs and Rivets

Provide in accordance with ASME B18.2.2 or ASTM A307.

2.2.7.3 Powder Actuated Fasteners

Follow safety provisions in accordance with ASSP A10.3.

2.2.7.4 Screws

Provide in accordance with ASME B18.2.1, ASME B18.6.2, ASME B18.6.3 and

ASTM C1513.

2.2.7.5 Washers

SECTION 05 50 13 Page 5

Provide plain washers in accordance with ASME B18.22M, ASME B18.21.1.

Provide beveled washers for American Standard beams and channels, square or rectangular, tapered in thickness, and smooth. Provide lock washers in accordance with ASME B18.21.2M, ASME B18.21.1.

2.2.7.6 Welded Headed Shear Studs

Provide in accordance with[ ASTM A108][ or][ ASTM A29/A29M-12].

2.2.8 Aluminum Alloy Products

Provide in accordance with ASTM B209M, ASTM B209 for sheet plate, ASTM B221M, ASTM B221M, ASTM B221 for extrusions and ASTM B26/B26M or ASTM B108/B108M for castings. Provide aluminum extrusions at least 3 mm 1/8 inch thick and aluminum plate or sheet at least 1.3 mm 0.050 inch thick.

2.3 FABRICATION FINISHES

2.3.1 Galvanizing

Hot-dip galvanize items specified to be zinc-coated, after fabrication where practicable. Provide galvanizing in accordance with ASTM A123/A123M, ASTM A153/A153M, ASTM A653/A653M or ASTM A924/A924M, Z275 G90.

2.3.2 Galvanize

Anchor bolts, grating fasteners, washers, and parts or devices necessary for proper installation, unless indicated otherwise.

2.3.3 Repair of Zinc-Coated Surfaces

Repair damaged surfaces with galvanizing repair method and paint in accordance with ASTM A780/A780M or by application of stick or thick paste material specifically designed for repair of galvanizing, as approved by Contracting Officer. Clean areas to be repaired and remove slag from welds. Heat, with a torch, surfaces to which stick or paste material will be applied. Heat to a temperature sufficient to melt the metals in the stick or paste. Spread molten material uniformly over surfaces to be coated and wipe off excess material.

2.3.4.1 Surface Preparation

Blast clean surfaces in accordance with SSPC SP 6/NACE No.3. Surfaces that will be exposed in spaces above ceiling or in attic spaces, crawl spaces, furred spaces, and chases may be cleaned in accordance with SSPC SP 3 in lieu of being blast cleaned. Wash cleaned surfaces which become contaminated with rust, dirt, oil, grease, or other contaminants with solvents until thoroughly clean. Steel to be embedded in concrete must be free of dirt and grease prior to embed. Do not paint or galvanize bearing surfaces, including contact surfaces within slip critical joints.

Shop coat these surfaces with rust prevention.

2.3.5 Nonferrous Metal Surfaces

Protect by plating, anodic, or organic coatings.

2.3.6 Aluminum Surfaces

2.3.6.1 Surface Condition

SECTION 05 50 13 Page 6

Before finishes are applied, remove roll marks, scratches, rolled-in scratches, kinks, stains, pits, orange peel, die marks, structural streaks, and other defects which will affect uniform appearance of finished surfaces.

2.3.6.2 Aluminum Finishes

Unexposed sheet, plate and extrusions may have mill finish as fabricated.

PART 3 EXECUTION

3.1 GENERAL INSTALLATION REQUIREMENTS

Install items at locations indicated in accordance with manufacturer's instructions. Verify all field dimensions prior to fabrication. Include materials and parts necessary to complete each assembly, whether indicated or not. Miss-alignment and miss-sizing of holes for fasteners is cause for rejection. Conceal fastenings where practicable. Joints exposed to weather must be watertight.

3.2 WORKMANSHIP

Provide miscellaneous metalwork that is true and accurate in shape, size, and profile. Make angles and lines continuous and straight. Make curves consistent, smooth and unfaceted. Provide continuous welding along the entire area of contact except where tack welding is permitted. Do not tack weld exposed connections. Unless otherwise indicated and approved, provide a smooth finish on exposed surfaces. Provide countersunk rivets where exposed. Provide coped and mitered corner joints aligned flush and without gaps.

3.3 ANCHORAGE, FASTENINGS, AND CONNECTIONS

Provide anchorage as necessary, whether indicated or not, for fastening miscellaneous metal items securely in place. Include slotted inserts, expansion shields, powder-driven fasteners, toggle bolts (when approved for concrete), through bolts for masonry, headed shear studs, machine and carriage bolts for steel, through bolts, lag bolts, and screws for wood.

Do not use wood plugs. Provide non-ferrous attachments for non-ferrous metal. Provide exposed fastenings of compatible materials (avoid contact of dissimilar metals), that generally match in color and finish the surfaces to which they are applied. Conceal fastenings where practicable.

Provide all fasteners flush with the surfaces they fasten, unless indicated otherwise.

3.4 BUILT-IN WORK

Where necessary and not otherwise indicated, form built-in metal work for anchorage with concrete or masonry. Provide built-in metal work in ample time for securing in place as the work progresses.

3.5 DISSIMILAR METALS

Where dissimilar metals are in contact, protect surfaces with a coating in accordance with MPI 79 to prevent galvanic or corrosive action. Where aluminum is in contact with concrete, plaster, mortar, masonry, wood, or absorptive materials subject to wetting, protect in accordance with ASTM D1187/D1187M, asphalt-base emulsion. Clean surfaces with metal shavings from installation at the end of each work day.

SECTION 05 50 13 Page 7

3.6 PREPARATION

3.6.1 Material Coatings and Surfaces

Remove rust preventive coating just prior to field erection, using a remover approved by the metal manufacturer. Surfaces, when assembled, must be free of rust, grease, dirt and other foreign matter.

3.6.2 Environmental Conditions

Do not clean or paint surfaces when damp or exposed to foggy or rainy weather, when metallic surface temperature is less than minus 15 degrees C 5 degrees F above the dew point of the surrounding air, or when surface temperature is below 7 degrees C or over 35 degrees C 45 degrees F or over 95 degrees F, unless approved by the Contracting Officer. Metal surfaces to be painted must be dry for a minimum of 48 hours prior to the application of primer or paint.

3.8 EXPANSION JOINT COVERS

Provide in accordance with manufacturer's written instructions. Verify installation allows specified movement prior to completion of work

07 54 50-1

SECTION 07 54 50

THERMOPLASTIC POLYOLEFIN (TPO) MEMBRANE

ROOFING

186th ARW - Key Field, Meridian, MS

1.1 SECTION INCLUDES

A. Thermoplasitc Polyolefin Membrane Roofing.

B. Membrane Flashings.

C. Metal Flashings.

D. Roof Insulation.

1.2 REFERENCES

A. American Society of Civil Engineers (ASCE) - ASCE 7 - Minimum Design Loads for Buildings and Other Structures, Current Revision.

B. ANSI/SPRI WD-1 "WindDesign Standard for Roofing Assemblies".

C. ASTM International (ASTM):

1. ASTM D 6878 - Standard Specification for Thermoplastic Polyolefin Based

Sheet Roofing.

D. Factory Mutual (FM Global):

1. Approval Guide.

a. Factory Mutual Standard 4470 - Approval Standard for Class 1 Roof Covers.

b. Loss Prevention Data Sheets 1-28, 1-29.

E. International Code Council (ICC):

1. International Building Code (IBC).

F. National Roofing Contractors Association (NRCA) - Low Slope Roofing and

Waterproofing Manual, Current Edition.

G. Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA) - Architectural Sheet Metal Manual.

H. Underwriters Laboratories (UL):

1. TGFU R1306 - "Roofing Systems and Materials Guide".

2. UL-790 - Standard Test Method for Fire Tests of Roof Coverings.

I. ANSI/ASHRAE/IESNA Standard 9.1 (2007): Energy Standard for Buildings Except

Low-Rise Residential Buildings.

07 54 50-2

1.3 DESIGN CRITERIA

A. Wind Uplift Performance:

1. Roof system is designed to withstand wind uplift forces as calculated using the current revision of ASCE-7.

2. Roof manufacturer must provide 90 mph wind resistance warranty.

8. Fire Resistance Performance:

1. Roof system will achieve a UL Class A rating when tested in accordance with

UL-790.

C. Drainage: Provide a roof system with positive drainage where all standing water dissipates within 48 hours after precipitation ends.

D. Building Codes:

1. Roof system will meet the requirements of IBC 2009 code and UFC (latest edition).

1.4 SUBMITTALS

A. Submit under provisions of Section 01300.

8. . Product Data: Manufacturer's data sheets on each product to be used, including:

1. Preparation instructions and recommendations.

2. Storage and handling requirements and recommendations.

3. Installation methods.

C. Detail Drawings:

1. Submit approved plan, section, elevation or isometric drawings which detail the appropriate methods for all flashing conditions found on the project.

2. Coordinate approved drawings with locations found on the Contract Drawings.

D. Verification Samples: For each finish product specified, two samples, minimum size 4 inches (100 mm) square representing actual product. color, and patterns.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications: All primary products specified in this section will be supplied by a single manufacturer with a minimum of fifteen (15) years experience.

8. Installer Qualifications:

1. All products listed in this section are to be installed by a single installer with a minimum of five (5) years demonstrated experience in installing products of the same type and scope as specified.

2. Installer must be capable of extending the Manufacturer's Labor and Materials guarantee.

3. Installer must be capable of extending the Manufacturer's No Dollar Limit guarantee.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Store products in manufacturer's unopened packaging until ready for installation.

B. Store and dispose of hazardous materials, and materials contaminated by hazardous materials, in accordance with requirements of local authorities having jurisdiction.

C. Material Safety Data Sheets (MSDS) must be on location at all times during the

07 54 50-3 transportation, storage and application of materials.

D. When loading materials onto the roof, the Carlisle Authorized Roofing Applicator must comply with the requirements of the building owner to prevent overloading and possible disturbance to the building structure.

1.7 PROJECT CONDITIONS

A. Proceed with roofing work only when weather conditions are in compliance with the manufacturer's recommended limitations, and when conditions will permit the work to proceed in accordance with the manufacturer's requirements and recommendations.

8. Proceed with work so new roofing materials are not subject to construction traffic.

When necessary, new roof sections shall be protected and inspected upon completion for possible damage.

C. The surface on which the insulation or roofing membrane is to be applied shall be clean, smooth, dry, and free of projections or contaminants that would prevent proper application of or be incompatible with the new installation, such as fins, sharp edges, foreign materials, oil and grease.

D. New roofing shall be complete and weather tight at the end of the work day.

E. Contaminants such as grease, fats and oils shall not be allowed to come in direct contact with the roofing membrane.

1.8 WARRANTY

A. At project closeout, provide to Owner or Owners Representative an executed copy of the manufacture'rs Total System warranty, outlining its terms, conditions, and exclusions from coverage.

1. Duration: 20 Years.

2. Pro-Rated Warranties will not be accepted.

B. When positioning membrane sheets, exercise care to locate all field splices away from low spots and out of drain sumps. All field splices should be shingled to prevent bucking of water.

2.1 MANUFACTURERS

A. Acceptable Manufacturer: Carlisle SynTec, which is located at: P. 0. Box 7000

Carlisle, PA 17013; Toll Free Tel: 800-4-SYNTEC; Tel: 717-245-7000; Email:

request info (market@syntec.carlisle.com;) Web: www.carlisle-syntec.com

B. Other roof systems of equal (or greater) performance may be submitted for approval.

2.2 SCOPE/ APPLICATION

A. The existing roof assembly consists of 22ga metal deck, 3" polyisocyanurate mechanically fastened to the deck using screws and plates, and an EPDM membrane adhered to the polyisocyanurate. The roof has suffered wind damage separating the membrane from the insulation. The scope of work consists of removing the existing EPDM, replacing damaged insulation, mechanically fastening a new cover board over the existing insulation, and adhering Carlisle Fleeceback (or equal) TPO membrane in low rise foam adhesive.

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B. Roof System: Provide a waterproof roof system, capable of withstanding uplift forces as specified in the Design Criteria article of this section.

1. Membrane Attachment: Fully Adhered.

C. Base Flashing: Provide a waterproof, fully adhered base flashing system at all penetrations, plane transitions and terminations.

D. Insulation: Provide a roof insulation system beneath the finish membrane.

2.3 INSULATION

A. Water-resistant and silicone treated gypsum panel cover board with embedded fiberglass facer on both sides, and pre-primed on one side. GP Gypsum Dens-Deck Prime, distributed by Carlisle (or equal).

1. Board Thickness: 1/2 inch (13mm).

8. Base Layer-Existing Insulation-REPLACE DAMAGED POLYISO

1. Type: Polyisocyanurate.

2. Thickness: 3" inches.

3. Attachment Method: MF.

1.1 THERMOPLASTIC POLYOLEFIN (TPO) MEMBRANE

A. Sure-Weld FleeceBACK Membrane: TPO membrane with a 55-mil fleece bonded to the underside (or equal).

1. Color: White.

2. Membrane Thickness: 115 mil nominal I 60 mil over fleece.

3. Sheet Dimensions:

a. Width: 12 feet (3.66 m) maximum.

b. Length: 100 feet (30.5 m) maximum.

4. Performance:

a. Breaking Strength: FB 100 - 300 lbf (1.3 kN) minimum/ FB 115 - 400

(1.8 kN) minimum.

b. Tear Strength: 55 lbf/in (245 Nim) minimum.

c. Elongation: 25 percent.

1.2 FLASHING ACCESSORIES

A. Inside Corners: Pre-molded corner flashing for inside corners. 60 mil thickness.

Color to match membrane. Special colors require custom fabrication process.

8. Outside Corners: Injection molded corner used for flashing outside corners. 60 mil thickness. Color to match membrane. Special colors require custom fabrication process.

C. TPO T-Joint Covers: Injection molded 60 mil thick TPO formed into a 4.5 inch

(114mm) diameter circle used to seal step-offs at splice intersections. Color to match membrane. Special colors require custom fabrication process.

D. Molded Pipe Seals: A pre-molded flashing and clamping ring used for pipe penetrations. Available for 0.75 inch to 8 inch (19 - 203.2mm) diameter pipes. Color to match membrane. Special colors not available.

E. TPO Molded Sealant Pockets:

1. A two-piece, interlocking injection molded, flexible pocket with a rigid polypropylene vertical wall and pre-formeddeck flanges. Color to match membrane. Special colors not available.

07 54 50-5

2. Used with Thermoplastic One-Part Pourable Sealer as specified in this section for waterproofing pipe clusters or other odd shaped penetrations.

F. Sure-Weld Heat Weldable Walkway Rolls: Superior tear, puncture and weather resistance and designed to protect Sure-Weld membrane in those areas exposed to repetitive foot traffic or other hazards. Walkway material may be heat welded to Sure-Weld membrane using an automated heat welder or hand held heat welder.

Walkway Rolls are 34 inches (864mm) wide by 50 feet (15.2 m) long and are nominal 180 mils thick. Color - White, gray and tan.

G. Non-Reinforced Flashing: Non-reinforced TPO flashing is a 60-mil thick non-reinforced TPO based membrane used for detail work where the use of pre-molded or pre-fabricated accessories is not feasible. Color - White, gray and tan. Special colors require lead time and 5,000 square foot minimum.

1.3 CLEANERS, PRIMERS, ADHESIVES AND SEALANTS

A Sure-Weld Bonding Adhesive: A high-strength solvent-based contact adhesive used for bonding Sure-Weld membrane to various porous and non-porous substrates.

1. Base: Synthetic Rubber.

2. Color: Yellow.

3. Solids: 20.0 percent.

4. voe: 670 grams/liter.

8. FAST Bag in a Box: A two-component, polyurethane construction grade, low-rise expanding adhesive designed for bonding insulation to various substrates, packaged for use with the PaceCart 2.

C. Cut Edge Sealant: A medium solids content, free flowing polymeric material designed for sealing cut edges (exposed fabric) of Sure-Weld reinforced membrane.

D. Water Cut-Off Mastic: A one-component, low viscosity, self wetting, Butyl blend mastic used as a compression sealing agent between membrane and applicable substrates.

E. TPO Primer: Solvent-based product designed to prepare TPO membrane for improved adhesion to TPO surfaces prior to the application of pressure-sensitive products and sealant pockets.

F. Universal Single-Ply Sealant: A 100 percent solids, solvent free, voe free, one-part polyether sealant that provides a weather tight seal to a variety of building materials.

It is used for general caulking such as above termination bars and metal counter flashings and at scupper details.. Available in white only.

G. Thermoplastic One-Part Sealant: Single component, moisture curing, elastomeric polyether sealant that is compatible with Carlisle's Thermoplastic membranes.

Provides a flexible, durable and long lasting seal around hard-to-flash penetrations in Thermoplastic Roofing Systems.

H. Carlisle Weathered Membrane Cleaner: Clear, solvent-based cleaner used to loosen and remove contaminants from the surface of exposed membrane.

1.4 FASTENING COMPONENTS

A lnsulFast Fasteners (or equal): Threaded, #12 fasteners with a #3 Phillips head used with 3 inch (76mm) diameter Insulation Plates. For insulation attachment into steel or wood decks.

07 54 50-6

B. Insulation Fastening Plates: A nominal 3 inch (76mm) diameter metal plate used for insulation attachment in conjunction with the appropriate Carlisle Fastener.

1.5 EDGINGS AND TERMINATIONS

A SecurEdge 300 Coping: An anchor cleat with pre-slotted holes, a concealed joint cover, and 10 or 12 foot sections of coping cap. Kynar 500 finish as noted on the Finish Schedule of the Contract Drawings.

B. Sure -Seal Termination Bar: 1 inch (13 mm) wide, .098 inch (2.5mm) thick extruded aluminum bar pre-punched 6 inches (152 mm) on center with sealant ledge to support Lap Sealant.

PART 2 EXECUTION

2.1 EXAMINATION

A Do not begin installation until substrates have been properly prepared.

B. If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.

2.2 PREPARATION

A Clean surfaces thoroughly prior to installation.

B. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.

C. Do not commence work until all other work trades have completed jobs that require them to traverse the deck on foot or with equipment.

2.3 INSULATION – SYSTEM DESIGN

A Base Layer-Existing Insulation-REPLACE DAMAGED POLYISO

1. Type: Polyisocyanurate.

2. Thickness: 3" inches.

B. Top Layer-New Cover Board

1. Type: Dens-Deck Prime.

2. Thickness: 1/2 inch.

2.4 ROOF MEMBRANE REMOVAL

A Remove and properly dispose of the existing EPDM membrane.

2.5 INSULATION PLACEMENT

A The existing Polyiso has suffered wind and water damage. Remove and replace damaged or wet areas with same type and thickness with polyisocyanurate.

B. Install new cover board over the polyisocyanurate. Boards should be butted tightly together with no joints or gaps greater than 1/4 inch (6 mm). Stagger joints both horizontally and vertically

07 54 50-7

C. Secure insulation to the substrate with the required mechanical fasteners or insulation adhesive in accordance with the manufacturer's current application guidelines.

D. Do not install wet, damaged or warped insulation boards.

E. Miter and fill the edges of the insulation boards at ridges, valleys and other changes in plane to prevent open joints or irregular surfaces. Avoid breaking or crushing of the insulation at the corners.

F. Do not install any more insulation than will be completely waterproofed each day.

2.6 INSULATION ATTACHMENT

A. Securely attach insulation to the roof deck for Adhered Roofing Systems.

Attachment must have been successfully tested to meet or exceed the calculated uplift pressure required by the International Building Code (ASCE-7) or ANSI/SPRI

WD-1.

3.7 MEMBRANE INSTALLATION

A. Adhere Carlisle Fleeceback (or equal) membrane to the cover board using Fast

100 low rise adhesive. Follow manufacturer's recommendations for adhesive coverage.

3.8 SEAM WELDING

A. Hot-air weld membrane using an Automatic Hot Air Welding Machine or Hot Air

Hand Welder in accordance with the manufacturer's current guidelines. At all splice intersections, roll the seam with a silicone roller to ensure a continuous hot air welded seam.

B. Overlay all splice intersections with Sure-Weld T-Joint Cover.

C. Probe all seams once the hot air welds have thoroughly cooled (approximately 30 minutes).

D. Repair all seam deficiencies the same day they are discovered.

E. Apply Cut Edge Sealant on all cut edges of reinforced membrane (where the scrim reinforcement is exposed) after seam probing is complete. Cut Edge Sealant is not required on vertical splices.

1.2 FLASHING

A. Flashing of parapets, curbs, expansion joints and other parts of the roof must be performed using Sure-Weld reinforced membrane or prefabricated accessories.

Sure-Weld non-reinforced membrane may be used for flashing pipe penetrations, Sealant Pockets, and scuppers, as well as inside and outside corners, when the use of pre-molded or prefabricated accessories is not feasible.

B. Remove existing coping and re-install. If damaged during removal, install new

Carlisle Securedge Coping (or equal) that has been tested to meet ANSI/SPRI

ES1.

C. Follow manufacturer's typical flashing procedures for all wall, curb, and penetration flashing including metal edging/coping and roof drain applications.

07 54 50-8

1.3 WALKWAYS

A Install walkways at all traffic concentration points (such as roof hatches, access doors, rooftop ladders, etc.) and all locations as identified on the Contract Drawings.

B. Hot-air weld walkway pads to the membrane in accordance with the manufacturer's current application guidelines.

1.4 DAILY SEALS

A On phased roofing, when the completion of flashings and terminations is not achieved by the end of the work day, a daily seal must be performed to temporarily close the membrane to prevent water infiltration.

B. Complete an acceptable membrane seal in accordance with the manufacturer's requirements.

1.5 CLEAN UP

A Perform daily clean-up to collect all wrappings, empty containers, paper, and other debris from the project site. Upon completion, all debris must be disposed of in a legally acceptable manner.

B. Prior to the manufacturer's inspection for warranty, the applicator must perform a pre-inspection to review all work and to verify all flashing has been completed as well as the application of all caulking.

1.6 PROTECTION

A Protect installed products until completion of project.

B. Touch-up, repair or replace damaged products before Substantial Completion.

SECTION 07 92 00 Page 1

SECTION 07 92 00

JOINT SEALANTS

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM C509 (2006; R 2015) Elastomeric Cellular

Preformed Gasket and Sealing Material

ASTM C734 (2015) Low-Temperature Flexibility of

Latex Sealants After Artificial Weathering

ASTM C834 (2017) Standard Specification for

Latex Sealants

ASTM C919 (2012; R 2017) Standard Practice for Use of Sealants in Acoustical Applications

ASTM C920 (2018) Standard Specification for Elastomeric Joint Sealants

ASTM C1193 (2013) Standard Guide for Use of Joint Sealants

ASTM C1311 (2014) Standard Specification for

Solvent Release Agents

ASTM C1521 (2013) Standard Practice for Evaluating Adhesion of Installed Weatherproofing Sealant Joints

ASTM D217 (2017) Standard Test Methods for

Cone Penetration of Lubricating Grease

ASTM D1056 (2014) Standard Specification for Flexible Cellular Materials - Sponge or Expanded Rubber

ASTM D1667 (2017) Standard Specification for

Flexible Cellular Materials - Poly (Vinyl Chloride) Foam (Closed-Cell)

ASTM D2452 (2015) Standard Test Method for

Extrudability of Oil- and Resin- Base Caulking Compounds

ASTM D2453 (2015) Standard Test Method for

Shrinkage and Tenacity of Oil- and

SECTION 07 92 00 Page 2

Resin-Base Caulking Compounds

ASTM E84 (2018a) Standard Test Method for Surface Burning Characteristics of Building Materials

CALIFORNIA DEPARTMENT OF PUBLIC HEALTH (CDPH)

CDPH SECTION 01350 (2010; Version 1.1) Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources using Environmental Chambers

SCIENTIFIC CERTIFICATION SYSTEMS (SCS)

SCS SCS Global Services (SCS) Indoor

Advantage SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT (SCAQMD)

SCAQMD Rule 1168 (2017) Adhesive and Sealant

Applications UNDERWRITERS LABORATORIES (UL)

UL 2818 (2013) GREENGUARD Certification Program For Chemical Emissions For Building Materials, Finishes And Furnishings

SECTION 07 92 00 Page 3

1.2 SUBMITTALS

Government may require submittals on all proposed sealants and adhesives.PRODUCT DATA

Include storage requirements, shelf life, curing time, instructions for mixing and application, and accessories. Provide manufacturer's Safety Data Sheets (SDS) for each solvent, primer and sealant material proposed.

1.5 ENVIRONMENTAL CONDITIONS

Apply sealant when the ambient temperature is between 40 and 90 degrees F.

1.6 DELIVERY AND STORAGE

Deliver materials to the jobsite in unopened manufacturers' sealed shipping containers, with brand name, date of manufacture, [color,] and material designation clearly marked thereon. Label elastomeric sealant containers to identify type, class, grade, and use. Handle and store materials in accordance with manufacturer's printed instructions.

Prevent exposure to foreign materials or subjection to sustained temperatures exceeding 90 degrees F or lower than 0 degrees F. Keep materials and containers closed and separated from absorptive materials such as wood and insulation.

1.7 QUALITY ASSURANCE

1.7.1 Compatibility with Substrate

Verify that each sealant is compatible for use with each joint substrate in accordance with sealant manufacturer's printed recommendations for each application.

1.7.2 Joint Tolerance

Provide joint tolerances in accordance with manufacturer's printed instructions.

1.7.3 Mock-Up

Upon request, provide a mock-up of each type of sealant using materials, colors, and techniques approved for use on the project.

Approved mock-ups may be incorporated into the Work.

1.7.4 Adhesion

Provide in accordance with ASTM C1193 or ASTM C1521.

2.1 SEALANTS

Provide sealant products that have been tested, found suitable, and documented as such by the manufacturer for the particular substrates to which they will be applied.

2.1.2 Exterior Sealants

For joints in vertical surfaces, provide ASTM C920, Type S or M, Grade NS, Class 25, Use NT. For joints in horizontal surfaces, provide ASTM

SECTION 07 92 00 Page 4

C920, Type S or M, Grade P, Class 25, Use T. Note, color "as selected" refers to match the adjacent substrates.

2.1.3 Preformed Sealants

Provide preformed sealants of polybutylene or isoprene-butylene based pressure sensitive weather resistant tape or bead sealants capable of sealing out moisture, air and dust when installed as…